# Kernel

```json
{
  "name": "Kernel",
  "slug": "kernel",
  "url": "https://composio.dev/toolkits/kernel",
  "markdown_url": "https://composio.dev/toolkits/kernel.md",
  "logo_url": "https://logos.composio.dev/api/kernel",
  "categories": [
    "developer tools & devops"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-10-31T05:35:27.828Z"
}
```

![Kernel logo](https://logos.composio.dev/api/kernel)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Kernel MCP or direct API to launch cloud browsers, run Playwright tasks, control computers, and manage persistent browser profiles through natural language.

## Summary

Kernel is a browser automation platform with cloud browsers, computer controls, Playwright execution, and session replays.
It provides persistent browser profiles and reliable infrastructure for browser-based workflows.

## Categories

- developer tools & devops

## Toolkit Details

- Tools: 35

## Images

- Logo: https://logos.composio.dev/api/kernel

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for Kernel.
  - Setup:
    - Configure Api Key credentials for Kernel.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

- Launch a cloud browser for checkout testing
- Run Playwright checks on a web app
- Review a browser session replay

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `KERNEL_BATCH_COMPUTER_ACTIONS` | Batch Computer Actions | Execute 1-100 computer actions sequentially in a Kernel browser, stopping on the first error. Actions can click, type, press keys, and submit forms or cause other irreversible external effects. |
| `KERNEL_BROWSER_CURL` | Browser Curl | Send a read-only GET, HEAD, or OPTIONS request through a Kernel browser's network stack, inheriting its cookies, TLS fingerprint, proxy settings, and default headers. For POST, PUT, PATCH, or DELETE, use Browser HTTP Request. |
| `KERNEL_BROWSER_HTTP_REQUEST` | Browser HTTP Request | Send a state-changing POST, PUT, PATCH, or DELETE request through a Kernel browser's network stack, inheriting its cookies, TLS fingerprint, proxy settings, and default headers. The target may change external systems irreversibly. For GET, HEAD, or OPTIONS, use Browser Curl. |
| `KERNEL_CLICK` | Click | Click at browser viewport coordinates with an optional mouse button, click phase, modifiers, and repetition count. A click can submit forms, place orders, or cause other irreversible external effects. |
| `KERNEL_CREATE_BROWSER` | Create Browser | Create a Kernel browser session; defaults to a headless browser with a 60-second inactivity timeout. |
| `KERNEL_CREATE_PROFILE` | Create Profile | Create an empty persistent browser profile, optionally with a unique name, for reuse by later browser sessions. |
| `KERNEL_DELETE_BROWSER` | Delete Browser | Permanently end and delete a Kernel browser session by ID or name. |
| `KERNEL_DELETE_PLAYWRIGHT_EXECUTOR` | Delete Playwright Executor | Stop and permanently delete a named, non-default Playwright executor from a Kernel browser. Its running call fails, its name can be reused, and close_tab controls whether its tab is also closed. To restart the reserved default executor, use Restart Default Playwright Executor. |
| `KERNEL_DELETE_PROFILE` | Delete Profile | Permanently delete a browser profile by ID or name. |
| `KERNEL_DOWNLOAD_PROFILE` | Download Profile | Download a profile's stored browser state. Current profiles return the requested tar.zst or uncompressed tar format; legacy profiles may return JSON regardless of the requested format. The profile must have captured state from a browser session. |
| `KERNEL_DRAG_MOUSE` | Drag Mouse | Drag a mouse button through an ordered path of browser viewport coordinates, with optional timing, linear-step, and modifier controls. A drag can move items, submit controls, or cause other irreversible external effects. |
| `KERNEL_EXECUTE_PLAYWRIGHT` | Execute Playwright | Execute arbitrary TypeScript or JavaScript with Playwright access to the browser; the code may navigate, mutate pages, submit forms, or cause irreversible external effects. |
| `KERNEL_GET_BROWSER` | Get Browser | Get safe operational details for one browser session by ID or name, optionally including a deleted session. |
| `KERNEL_GET_MOUSE_POSITION` | Get Mouse Position | Get the current mouse cursor coordinates in a Kernel browser session. |
| `KERNEL_GET_PROFILE` | Get Profile | Get one browser profile by its ID or exact name. |
| `KERNEL_GET_REPLAY` | Get Replay | Download a completed browser replay as MP4. If the replay is still processing, the action asks the caller to retry later. |
| `KERNEL_LIST_BROWSERS` | List Browsers | List browser sessions, optionally filtered by lifecycle state, search text, tags, or region, one offset page at a time. |
| `KERNEL_LIST_PLAYWRIGHT_EXECUTORS` | List Playwright Executors | List the default and named Playwright executors for a Kernel browser, including whether each is busy and its owned tab when available. |
| `KERNEL_LIST_PROFILES` | List Profiles | List browser profiles, optionally filtered by substring or exact name, one offset page at a time. |
| `KERNEL_LIST_REPLAYS` | List Replays | List replay recordings for a headful browser session without returning signed viewer URLs. |
| `KERNEL_MOVE_MOUSE` | Move Mouse | Move the cursor to browser viewport coordinates, optionally using a timed human-like path and held modifier keys. |
| `KERNEL_PRESS_KEY` | Press Key | Press an ordered sequence of X11 keys or key chords in a browser, optionally holding modifiers or holding the sequence for a duration. Key presses may submit forms, activate controls, or trigger other irreversible external effects. |
| `KERNEL_READ_CLIPBOARD` | Read Clipboard | Read the current text from a Kernel browser session's clipboard. |
| `KERNEL_RENAME_PROFILE` | Rename Profile | Rename a Kernel browser profile by ID or exact name. Rename profiles only when they are not in use because sessions referencing the old name may fail to save their changes. |
| `KERNEL_RESTART_DEFAULT_PLAYWRIGHT_EXECUTOR` | Restart Default Playwright Executor | Restart a Kernel browser's reserved default Playwright executor. Its process is stopped and any running call fails irreversibly; queued and later calls run on the new process. This does not delete a named executor or close a tab. |
| `KERNEL_SAVE_BROWSER_PROFILE` | Save Browser Profile | Save a running browser's current state to exactly one destination profile ID or name, creating a named profile when needed and overwriting an existing destination. This restarts the browser, closes all active connections, reloads pages, and loses in-memory page state; reconnect after completion. It does not attach the profile or enable save_changes. |
| `KERNEL_SCROLL` | Scroll | Scroll horizontally or vertically at browser viewport coordinates, optionally while holding modifier keys. |
| `KERNEL_SET_CURSOR_VISIBILITY` | Set Cursor Visibility | Hide or show the cursor in a Kernel browser session. |
| `KERNEL_START_REPLAY` | Start Replay | Start recording a headful Kernel browser session and return its replay identifier and recording metadata without exposing its signed viewer URL. |
| `KERNEL_STOP_REPLAY` | Stop Replay | Stop an active replay recording for a Kernel browser identified by ID or name. |
| `KERNEL_TAKE_SCREENSHOT` | Take Screenshot | Capture the full browser viewport or a rectangular region as a PNG download. |
| `KERNEL_TYPE_TEXT` | Type Text | Type text into the currently focused browser element with an optional per-keystroke delay. |
| `KERNEL_UPDATE_BROWSER` | Update Browser | Update mutable settings on an existing Kernel browser session. |
| `KERNEL_UPLOAD_BROWSER_EXTENSIONS` | Upload Browser Extensions | Upload and activate one or more unpacked Chromium extension ZIP archives in an existing running browser. This ad-hoc operation does not add extensions to Kernel's reusable extension catalog. Chromium may restart, disrupting active browser connections. |
| `KERNEL_WRITE_CLIPBOARD` | Write Clipboard | Write text to the system clipboard of a Kernel browser session. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
```python
pip install composio composio_openai openai
```

```typescript
npm install @composio/core @composio/openai openai
```

#### Path 1, Step 2: Create a Composio session

Initialize Composio with the OpenAI Responses provider and create a session scoped to Kernel
```python
import json
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
client = OpenAI()

session = composio.create(user_id="your-user-id", toolkits=["kernel"])
tools = session.tools()
```

```typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["kernel"] });
const tools = await session.tools();
```

#### Path 1, Step 3: Run Kernel tools with your agent

Send a request, execute the Kernel tool calls through the session, and print the final answer
```python
response = client.responses.create(
    model="gpt-5.6-sol",
    tools=tools,
    input=[{"role": "user", "content": "Launch a Kernel cloud browser, open https://example.com, and return the page title."}],
)

while True:
    tool_calls = [o for o in response.output if o.type == "function_call"]
    if not tool_calls:
        break
    results = composio.provider.handle_tool_calls(response=response, session=session)
    response = client.responses.create(
        model="gpt-5.6-sol",
        tools=tools,
        previous_response_id=response.id,
        input=[
            {"type": "function_call_output", "call_id": call.call_id, "output": json.dumps(results[i])}
            for i, call in enumerate(tool_calls)
        ],
    )

print(response.output_text)
```

```typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Launch a Kernel cloud browser, open https://example.com, and return the page title." }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK and your agent framework
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
```

#### Path 2, Step 2: Create a session with MCP enabled

Create a session scoped to Kernel and read its MCP URL and headers
```python
from composio import Composio

composio = Composio()
session = composio.create(user_id="your-user-id", toolkits=["kernel"], mcp=True)
```

```typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["kernel"],
  mcp: true,
});
```

#### Path 2, Step 3: Connect your agent to the MCP server

Pass the session's MCP URL and headers to your agent and run a Kernel request
```python
import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, AssistantMessage, TextBlock

options = ClaudeAgentOptions(
    mcp_servers={
        "composio": {
            "type": "http",
            "url": session.mcp.url,
            "headers": session.mcp.headers,
        }
    },
    system_prompt="You are a helpful assistant with access to Kernel tools.",
    tools=[],
    allowed_tools=["mcp__composio__*"],
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query("Launch a Kernel cloud browser, open https://example.com, and return the page title.")
        async for message in client.receive_response():
            if isinstance(message, AssistantMessage):
                for block in message.content:
                    if isinstance(block, TextBlock):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Launch a Kernel cloud browser, open https://example.com, and return the page title.",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
```

## Why Use Composio?

### 1. AI Native Kernel Integration

- Supports both Kernel MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable browser and automation tool execution
- Rich coverage for cloud browsers, Playwright runs, computer controls, session replays, and persistent profiles

### 2. Managed Auth

- Securely store and use your Kernel API key without hard-coding it into agent code
- Central place to manage, scope, and revoke Kernel access
- Per user and per environment credentials for safer browser automation

### 3. Agent Optimized Design

- Tools are tuned using real error and success rates to improve browser task reliability over time
- Comprehensive execution logs so you always know what ran, when, and on whose behalf

### 4. Enterprise Grade Security

- Fine-grained RBAC so you control which agents and users can access Kernel
- Scoped, least privilege access to browser sessions, profiles, and automation resources
- Full audit trail of agent actions to support review and compliance

## Use Kernel with any AI Agent Framework

Choose a framework you want to connect Kernel with:

- [ChatGPT](https://composio.dev/toolkits/kernel/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/kernel/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/kernel/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/kernel/framework/atomic-agent)

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## Frequently Asked Questions

### Do I need my own developer credentials to use Kernel with Composio?

Yes, Kernel requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)